The volume of a rectangular solid with those dimensions is 27 cm3.
If we also knew its mass, then we could calculate its density.
Density = grams/cm^3 (cc) 3 cm^3 = 27 cm^3 Density = 12 grams/27 cm^3 = 0.4 grams/cm^3 ----------------------------
5 g/cm^3.
3cm = 30mm.
It is likely that the shape you have in mind is a cube, with each edge being 3 cm long.
Volume cuboid = length x breadth x height = 3 cm x 5 cm x 3 cm = 45 cm³
Density = grams/cm^3 (cc) 3 cm^3 = 27 cm^3 Density = 12 grams/27 cm^3 = 0.4 grams/cm^3 ----------------------------
5 g/cm^3.
3cm + 4cm + 3cm + 4cm = 14 cm
3
2 cm x 3 cm = 6 cm
30mm converts to 3cm. Divide mm by 10 to get cm
The edge length would be 3 cm.
3cm = 30mm.
Density=Mass/Volume Mass=19.2 grams Volume=4cm x 3cm x 2cm=24 cm^3 Density=(19.2 grams)/(24 cm^3)= 0.8 g/cm^3 Note the unit, grams per cm^3, which is the mass unit divided by the volume unit.
It is likely that the shape you have in mind is a cube, with each edge being 3 cm long.
Volume cuboid = length x breadth x height = 3 cm x 5 cm x 3 cm = 45 cm³
3 cm * 2 cm = 3*2 sq cm = 6 sq cm.